Hey guys just wanna share my prob with you:
I've bought my Crysis 2 copy yesterday from a Store. I installed it correctly, it got patched 1.9 correctly and I could create and account and login correctly and I could play the single player. But today I tried the multiplayer and it tells me the serial key is wrong! Is not saying it's been using by other user (I think) it tells me its wrong! Do you know how can I fix this? I read some posts about writing the serial in lower case, without dashes, going to single player, bla bla bla but nothing works

Cheers guys and hope you can solve your problems!
KyMo